Question

Determine o 7* termo da PG ( 1, 4, ...).

Answer 1

An=a1.q^n-1
A7=1.4^7-1
A7=1.4^6
A7=1.4096
A7=4096

Answer 2

r=3

An=A1+(n-1).r

An= 1+21-3

AN= 19